/**
 * Copyright 2021 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// [START apps_script_analyticsdata]
/**
 * Runs a report of a Google Analytics 4 property ID. Creates a sheet with the
 * report.
 */
function runReport() {
  /**
   * TODO(developer): Uncomment this variable and replace with your
   *   Google Analytics 4 property ID before running the sample.
   */
  const propertyId = "YOUR-GA4-PROPERTY-ID";

  try {
    const metric = AnalyticsData.newMetric();
    metric.name = "activeUsers";

    const dimension = AnalyticsData.newDimension();
    dimension.name = "city";

    const dateRange = AnalyticsData.newDateRange();
    dateRange.startDate = "2020-03-31";
    dateRange.endDate = "today";

    const request = AnalyticsData.newRunReportRequest();
    request.dimensions = [dimension];
    request.metrics = [metric];
    request.dateRanges = dateRange;

    const report = AnalyticsData.Properties.runReport(
      request,
      `properties/${propertyId}`,
    );
    if (!report.rows) {
      console.log("No rows returned.");
      return;
    }

    const spreadsheet = SpreadsheetApp.create("Google Analytics Report");
    const sheet = spreadsheet.getActiveSheet();

    // Append the headers.
    const dimensionHeaders = report.dimensionHeaders.map((dimensionHeader) => {
      return dimensionHeader.name;
    });
    const metricHeaders = report.metricHeaders.map((metricHeader) => {
      return metricHeader.name;
    });
    const headers = [...dimensionHeaders, ...metricHeaders];

    sheet.appendRow(headers);

    // Append the results.
    const rows = report.rows.map((row) => {
      const dimensionValues = row.dimensionValues.map((dimensionValue) => {
        return dimensionValue.value;
      });
      const metricValues = row.metricValues.map((metricValues) => {
        return metricValues.value;
      });
      return [...dimensionValues, ...metricValues];
    });

    sheet.getRange(2, 1, report.rows.length, headers.length).setValues(rows);

    console.log("Report spreadsheet created: %s", spreadsheet.getUrl());
  } catch (e) {
    // TODO (Developer) - Handle exception
    console.log("Failed with error: %s", e.error);
  }
}
// [END apps_script_analyticsdata]
